reaction medium was changed to dichloromethane, the products of carbene transfer, NHC→Si(C2F5)2Cl2 and NHC→Si(C2F5)2ClH, respectively, were obtained instead. The formation of the latter species is a result of chloride/hydride metathesis. These compounds may serve as valuable precursors for electron‐poor silylenes. Furthermore, the reactivity of NHC→SiCl4 towards phosphines is discussed. The carbene complex
向卡宾转移试剂NHC→SiCl 4(NHC = 1,3-二甲基
咪唑啉丁-2-亚基)中添加BCl 3得到四配位和五配位的三
氯硅(IV)阳离子[(NHC)SiCl 3 ] +和[[ NHC)2 SiCl 3 ] +,以四
氯硼酸酯为抗衡离子。这与先前的反应相反,在先前的反应中,NHC→SiCl 4用作NHC
配体的转移试剂。另一方面,BF 3 · OEt 2的添加产生NHC→BF 3作为NHC转移的产物。此外,高
路易斯酸性双(五
氟乙基)
硅烷(C 2 F5)2) SiCl 2用NHC→SiCl 4处理。在
乙腈中,以[(C 2 F 5)SiCl 3 ] -作为抗衡离子检测到阳离子
硅(IV)络合物[(NHC)SiCl 3 ] +和[(NHC)2 SiCl 3 ] +。对于NHC→SiCl 4与(C 2 F 5)2 SiH 2的反应,已经报道了相似的结果,得到[(NHC)2 SiCl 2 H] [(C 2